Correct answer: (b) I, III, IV, II
Explanation
- A
I, II, III, IV
I, II, III, IV would put the Biological Diversity Act (2002) before Project Tiger (1973) and Project Elephant (1992). That order is historically false.
- B
I, III, IV, II
Wildlife (Protection) Act 1972, then Project Tiger 1973, then Project Elephant 1992, then Biological Diversity Act 2002. That is I, III, IV, II — the official key.
- C
II, III, IV, I
Starting with the Biological Diversity Act (2002) is centuries too late relative to the 1972 Act and 1973 tiger project.
- D
II, III, I, IV
This code also begins with the 2002 Act and mis-orders the rest.
Summary. Official key is (b) I, III, IV, II. Sequence: Wildlife (Protection) Act 1972 → Project Tiger 1973 → Project Elephant 1992 → Biological Diversity Act 2002.